#include <vector>
#include <memory>

// Define precision type (double precision in original)
using Real = double;

class ContactSolver15 {
public:
    // Main solution driver
    void solve(
        std::vector<int>& masterArray,      // Main data array (equivalent to MA)
        int contactInterfaceId,             // Contact interface ID (N)
        Real currentTime,                  // Current simulation time (TT)
        Real timeStep,                     // Time step size (DT1)
        Real& springWorkGlobal,            // Global spring work accumulator (SPRWRK)
        Real& frictionWorkGlobal           // Global friction work accumulator (FRCWRK)
    ) {
        // Initialize contact forces
        initializeContactForces(masterArray, contactInterfaceId);

        // Extract integer parameters
        int numSegments = getIntegerParam(masterArray, 1, contactInterfaceId);
        int numMasterNodes = getIntegerParam(masterArray, 2, contactInterfaceId);
        int numSlaveNodes = getIntegerParam(masterArray, 3, contactInterfaceId);
        int numNodes = getIntegerParam(masterArray, 4, contactInterfaceId);
        int contactType = getIntegerParam(masterArray, 5, contactInterfaceId);
        int contactAccelerator = getIntegerParam(masterArray, 10, contactInterfaceId);
        int activationFlag = getIntegerParam(masterArray, 16, contactInterfaceId);
        int normalFlag = getIntegerParam(masterArray, 17, contactInterfaceId);
        int drawFlag = getIntegerParam(masterArray, 19, contactInterfaceId);
        int frictionType = getIntegerParam(masterArray, 98, contactInterfaceId);
        int lithographyFlag = getIntegerParam(masterArray, 100, contactInterfaceId);

        // Extract real parameters
        Real scaleFactor = getRealParam(masterArray, 1, contactInterfaceId);
        Real frictionCoeff = getRealParam(masterArray, 2, contactInterfaceId);
        Real contactThickness = getRealParam(masterArray, 3, contactInterfaceId);
        Real startTime = getRealParam(masterArray, 4, contactInterfaceId);
        Real masterDamping = getRealParam(masterArray, 6, contactInterfaceId);
        Real slaveDamping = getRealParam(masterArray, 9, contactInterfaceId);
        Real thermalConductivity = getRealParam(masterArray, 33, contactInterfaceId);
        Real surfaceHeatTransfer = getRealParam(masterArray, 34, contactInterfaceId);
        Real separationStrength = getRealParam(masterArray, 50, contactInterfaceId);

        // Determine if contact conditions should be computed
        bool computeContact = (frictionType != 0 || separationStrength != 0.0 || 
                             lithographyFlag != 0);

        // Initialize detection if before start time
        if ((currentTime - timeStep) < startTime) {
            initializeDetection(masterArray, contactInterfaceId);
        }

        // Local work accumulators
        Real springWork = 0.0;
        Real frictionWork = 0.0;

        // Get current iteration count
        int iterationCount = getIntegerParam(masterArray, 9, contactInterfaceId);

        if (iterationCount == 1) {
            // First iteration - perform full contact detection and solution
            performDetection(masterArray, contactInterfaceId, computeContact, 
                           separationStrength);

            int numContactPairs = getIntegerParam(masterArray, 11, contactInterfaceId);
            
            computeForces(
                masterArray, numSlaveNodes, frictionCoeff, slaveDamping,
                masterDamping, normalFlag, numContactPairs, springWork,
                frictionWork, contactThickness, activationFlag, computeContact,
                separationStrength, contactInterfaceId, thermalConductivity,
                surfaceHeatTransfer, frictionType, lithographyFlag, scaleFactor
            );
        } else {
            // Subsequent iterations - retest existing contacts
            int numContactPairs = getIntegerParam(masterArray, 11, contactInterfaceId);
            
            retestContacts(
                masterArray, frictionCoeff, slaveDamping, masterDamping,
                activationFlag, contactThickness, normalFlag, numContactPairs,
                springWork, frictionWork, computeContact, separationStrength,
                contactInterfaceId, thermalConductivity, surfaceHeatTransfer,
                frictionType, lithographyFlag, scaleFactor
            );
        }

        // Accumulate work values
        updateGlobalWork(
            springWorkGlobal, frictionWorkGlobal, springWork, frictionWork, 
            timeStep, masterArray, contactInterfaceId
        );
    }

private:
    // Helper methods
    
    void initializeContactForces(std::vector<int>& masterArray, int contactId) {
        // Implementation would reset contact forces to zero
        // Equivalent to PUTCNTFOR calls in original
    }
    
    int getIntegerParam(const std::vector<int>& masterArray, int paramIndex, int contactId) {
        // Implementation would extract integer parameter from master array
        // Equivalent to IPARMGET in original
        return 0;
    }
    
    Real getRealParam(const std::vector<int>& masterArray, int paramIndex, int contactId) {
        // Implementation would extract real parameter from master array
        // Equivalent to RPARMGET in original
        return 0.0;
    }
    
    void initializeDetection(std::vector<int>& masterArray, int contactId) {
        // Implementation would perform initial contact detection
        // Equivalent to DETEM_INIT in original
    }
    
    void performDetection(std::vector<int>& masterArray, int contactId, 
                        bool computeContact, Real separationStrength) {
        // Implementation would perform full contact detection
        // Equivalent to DETEM_SOL in original
    }
    
    void computeForces(
        std::vector<int>& masterArray, int numSlaveNodes, Real frictionCoeff,
        Real slaveDamping, Real masterDamping, int normalFlag, int numContactPairs,
        Real& springWork, Real& frictionWork, Real contactThickness,
        int activationFlag, bool computeContact, Real separationStrength,
        int contactId, Real thermalConductivity, Real surfaceHeatTransfer,
        int frictionType, int lithographyFlag, Real scaleFactor
    ) {
        // Implementation would compute contact forces
        // Equivalent to FINTMR_SOL in original
    }
    
    void retestContacts(
        std::vector<int>& masterArray, Real frictionCoeff, Real slaveDamping,
        Real masterDamping, int activationFlag, Real contactThickness,
        int normalFlag, int numContactPairs, Real& springWork, Real& frictionWork,
        bool computeContact, Real separationStrength, int contactId,
        Real thermalConductivity, Real surfaceHeatTransfer, int frictionType,
        int lithographyFlag, Real scaleFactor
    ) {
        // Implementation would retest existing contacts
        // Equivalent to RETEST_SOL in original
    }
    
    void updateGlobalWork(
        Real& springWorkGlobal, Real& frictionWorkGlobal, Real springWork,
        Real frictionWork, Real timeStep, std::vector<int>& masterArray,
        int contactId
    ) {
        // Update global work accumulators
        springWorkGlobal += springWork;
        frictionWorkGlobal += 0.5 * timeStep * frictionWork;
        
        // Update contact force outputs
        // Equivalent to PUTCNTFOR calls in original
    }
};